Adjustable hinged yoke for squeezing machines



Patented Oct. 27,1931

PATENT] OFFICE The device which forms the subject ofour lnvention is an adjustable, hinged yoke or squeezing abutment which is used on a jarring and squeezing machine oron a plain squeezing machine for making sand molds or for other purposes to which the principle maybe applied. 7

Our device consists of a body, means for exerting pressure to make sand molds, a sup port pivotally mounted on said body, a yoke p votally mounted in, said support, a head movably mounted in. one end of said roller mounted for rotation in the opposite said yoke to normal relativeposition; I

ably shaped to provide a member on said base cooperating with said roller,

a counterbalance spring interposed between said support and spring interposed between said support and yieldingly retain them intheir For a further exposition of our device reference may be had to the annexed drawing and specification at the end whereof our invention will be specifically pointed out and claimed.

In the drawing,

There is disclosed a side elevation of our device with parts broken away.

In the embodiment of our invention chosen for illustration in the drawing, the device is shown as consisting of a base 1 which may be mounted so as to be portable on wheels 2 if so desired. If it is not desired to incorporate this feature of omitted. Base 1 may, if desired, carry a jarring table 3 upon which the mold is made and which moves upwardly in the usual manner for performing the squeezing operation, when air is admitted under piston (not illustrated in detail as it is well known in the art) contained within the base 1 in the manner usual in this type of machine.

Base 1 also carries a support 4 which is pivotally connected thereto by means of pins 5 or in any other suitable manner. At its upper end support 4 is forked or otherwise suitbearing for a pin or pins 6 by means of which yoke 7 is pivotally mounted on support 4. I

At one end yoke 7 has a squeezing head 8 said base and a .G

'nectedflat its means of pin 1 portability wheels 2 may be -When mold is located in the the squeezing thereof. During this port4 and yoke 7 'and serves to counterbalance the weight of Serial No. 520,609.

adjustably mounted therein. Hole 9, in yoke 7, and holes 10 in headS, provide means for adjusting the position of'head 8'relative to yoke 7 by passing a pin or other element, throlpgli1 a pair of these holes. As will be seen 6 in t e yoke 7 carries a roller 11 pivotally mounted therein. At this 8 end yoke 7 also has an end 12 suitably shaped for engagement with a stop-member.

This stop member is provided by the com bined guide and stop element which may consist of a screw 13 mounted in base 1 and 63 zontal'rela tion to sto pin 13. i Support 4 and yolie 7 are yieldingly re tained in their relative normal position by a spring 16 which bears' on a collar 17 carried on bolt 18. Bolt 18is pivotally conopposite end'to support 4 by etween support 4 and base 1 there is rovided a counterbalance spring 20 which bears I at one end on 'a collar'21 pivotally mounted on base 1 and "at its opposite end bears on housing 22 which" is carried by shaft 23 which in turn is pivotally connected to support 4,by pin'24.

he operation of our device is as follows: the jarring and squeezing operations of the machine are finished and a finishedr5 machinethe operator pushes yoke 7 back causing support 4 to pivot about pins 5. This causes'roller '11 to slide for a short distance horizontally on guide 14, I spring 16 expanding during'this movement 'oo and permitting yoke 7 to pivotrelative to support 4 about pivot 6; This movement carries end 12 of yoke 7 clear of pin 13 and upon further rearward movement of yoke 7, roller 11 travels down guide 14 and moves free es pivotal motion of supspring 20 is compressed head v8. The center of. gravity of head 8 is always maintained to the left of pivot 5,- as' said stop, and means for seen in the drawing, so that head 8 tends to return to position over jarring table 3. In the return movement of support 4 and yoke 7 roller 11 enters beneath guide 14 due to the curved shape of the end of the guide 14. Spring 16 again permits relative movement between support 4 and yoke 7. Roller 11 moves upward and then inward on guide 1d until end 12 of yoke 7 is located inthe proper horizontal position abutting screw 13 because of its lateral engagement with screw 15.

We do not intend to be limited in the practice of our invention save as the scope of the prior art and of the attached claims may require.

We claim: v

1. A squeezing. machine including a base, a support, a yoke pivotally mounted on said support, said yoke having a portion adapted to withstand the squeezing pressure, and a stop member on said base cooperating with the end of said yoketo Withstand said squeezing pressure.

2'. A machine including in combination a base, means on said base for exerting the squeezing pressure for forming sand molds, a support pivotally mounted on said base, a yoke pivotally mounted onsaid support and having at one end a portion adapted to cooperate with said squeezing means and to withstand the pressure thereof and having at its opposite end a face, stop means on sai base cooperating with the face of said yoke, and guide means for guiding said face into and out of abutment with said stop means.

3. A machine including a base, means on said base for exert'ng a squeezing pressure for making sand molds. a support pivotally mountedon said base, a yoke pivotally mounted on said support and having means cooperating with said squeezing means an adapted to withstand the squeezing pressu e and having at its opposite end a ace, a". atom on said base cooperating with the face of said volr to withstand the squeezing pressure,'c'oonerating means guiding the face of said yoke into and out of abutment with yieldingly retaining said yoke and said support in their relative normal posit-ion.

a. A machine including a means on said base a support pivotallymounte'd on said base, a yoke pivotall mounted on said support and having a portion adapted to coo erate with said squeezing means and to withstand the squeez ng pressure and having at i s opposite end a face. a stop member on said base coonerating with the face of said yoke to wi hbase, squeezing stand the squeezing pressure, means for guiding the face of said yoke into and out of engagement wih said stop, means for yle'ld ngly retaining said yoke and said support in their relative normal position,

and counterbalancing means interposed bespring yieldingly retaining for makinw sand molds,

yoke to receive the squeezing pressure, a roller mount-ed on said yoke adjacent said iace,

and guide means cooperating with said roller for guiding said faceinto and out of engagement with said stop.

6. A squeezing machine includingin combination a: base, means mounted on. said base for exerting the squeezing pressure to form sand molds, su port pivotally on said base, a yo e pivotally mounted. on said: support, a head adj ustably mounted in one end of said yoke for cooperation with said squeezing means to receive the squeezing pressure, a face on the opposite end of. said yoke, a stop on said base' cooperating with said face on said yoke to receive the squeezing pressure, a roller mounted on said yoke adjacent said face, a guide mounted. on said base for guiding said roller'to guide said 'face into and out of engagement with said stop, a

said yoke an said support in relative normal position, and a spring between said support and-said base for counterbalancing the weight of'said head.

LEROY TABOR. FRANK R. WALLACE.

mounted 

